Milad - have you watched the You-Tube videos done by LA Fish Guy when he goes to Reef Dynamics and talks to the owner? They're pretty good. 
 
I didn't know you could adjust the bubble size in a skimmer. I thought that was set by the pin wheel, so by restricting air flow would only change the number of bubbles. I'm no expert by any stretch of the imagination - my Reef Dynamics is still breaking in. 
		
	
		
		
		
		
			
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				Frank 
 
Baby-stepping my way into the hobby
			 
		
		
		
		
	
		
		
	
	
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